From 7f135e9ed0d5c3b6102f3df5d5fd258c6b746afc Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Thu, 29 Sep 2016 09:29:30 +0200
Subject: [PATCH] Add support for consumed generators in NormalizerFormatter,
 fixes #838

---
 src/Monolog/Formatter/NormalizerFormatter.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Monolog/Formatter/NormalizerFormatter.php b/src/Monolog/Formatter/NormalizerFormatter.php
index ab79dbcd..bef07ab5 100644
--- a/src/Monolog/Formatter/NormalizerFormatter.php
+++ b/src/Monolog/Formatter/NormalizerFormatter.php
@@ -74,6 +74,10 @@ class NormalizerFormatter implements FormatterInterface
             $normalized = array();
 
             $count = 1;
+            if ($data instanceof \Generator && !$data->valid()) {
+                return array('...' => 'Generator is already consumed, aborting');
+            }
+
             foreach ($data as $key => $value) {
                 if ($count++ >= 1000) {
                     $normalized['...'] = 'Over 1000 items, aborting normalization';